Figure 5.

Magnetic characteristics of sphalerite CdS NSs represented by lines of different colors. (a) Room-temperature M-H curves of samples S1 to S4. The inset shows ZFC and FC curves with a dc field of
100 Oe applied on sample S1. (b) M-H curves for sample S1 measured at different temperatures. (c) ESR spectra of sample S1 measured from 90 to 300 K. (d) The calculated ΔH which is Hcenter is far from 321 mT (g = 2.0023) and the variation of Ms at different temperatures for the same sample (S1).